@SmartAlec
What's happened?
All this partnership really is about is to enable Amiga to access Matrox' stuff earlier than say a member of the public.
Example would be that Hyperion had a Parhelia card ages before we the public knew anything at all (if you search theRegister.co.uk you'll see a quote there from Ben). Support from hardware makers is hugely important, without it (ie NVidea) no drivers. Support docs from the likes of ATI and Matrox could/will enable drivers to be written.
Matrox support has been promised, but whether it makes the initial OS4 release I've not yet seen, I suspect a BoingBag release could be favorite.
Any of these sort of 'partnerships' are not to be sniffed at, getting early access to data and hardware enables drivers to be ready on release, instead of always lagging behind.
-john